Harvard referencing a series of standards.
I am able to sufficiently reference standards using the report style in Zotero but how do I generally reference a series of standards, that is, a group of them and not the individual standards? An example would be the IEC 61508 series which has 7 standards covering the functional safety of electrical equipment. The problem I can see is what do I do for the year? My thought is to take the year of the oldest standard, or the first one, and use that. Does anyone else have any other advice to offer?
issued: 2007-2014